/* ── Light mode: custom dark header ── */
:root,
[data-md-color-scheme="default"] {
  --md-primary-fg-color: #2b2d42;
  --md-primary-fg-color--light: #3d3f5c;
  --md-primary-fg-color--dark: #1a1b2e;
  --md-accent-fg-color: #7c4dff;
}

/* ── Dark mode: let Material handle it, only tweak accent ── */
[data-md-color-scheme="slate"] {
  --md-accent-fg-color: #a78bfa;
}

/* ── Homepage cards ── */
.conf-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}
@media (max-width: 960px) {
  .conf-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .conf-grid { grid-template-columns: 1fr; }
}

.conf-card {
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 8px;
  padding: 1.2rem 1.5rem;
  transition: box-shadow 0.2s, transform 0.15s;
  background: var(--md-default-bg-color--light, var(--md-default-bg-color));
}

.conf-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
  transform: translateY(-2px);
}

[data-md-color-scheme="slate"] .conf-card {
  background: var(--md-default-bg-color--light);
}

[data-md-color-scheme="slate"] .conf-card:hover {
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}

.conf-card h3 {
  margin: 0 0 0.3rem 0 !important;
  font-size: 1.15rem;
}

.conf-card h3 a {
  color: var(--md-default-fg-color) !important;
  text-decoration: none;
}

.conf-card .conf-count {
  color: var(--md-default-fg-color--light);
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
}

.conf-card .area-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.conf-card .area-tag {
  display: inline-block;
  background: var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color--light);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  white-space: nowrap;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  cursor: pointer;
}

.conf-card .area-tag:hover {
  background: var(--md-accent-fg-color);
  color: #fff !important;
}

/* ── Hero section ── */
.hero {
  text-align: center;
  padding: 2rem 0 1rem;
}

.hero h1 {
  font-size: 2.2rem !important;
  margin-bottom: 0.3rem !important;
}

.hero .hero-subtitle {
  color: var(--md-default-fg-color--light);
  font-size: 1.05rem;
  margin-bottom: 0.3rem;
}

.hero .hero-stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1.2rem 0;
  flex-wrap: wrap;
}

.hero .stat {
  text-align: center;
}

.hero .stat-number {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--md-accent-fg-color);
}

.hero .stat-label {
  font-size: 0.85rem;
  color: var(--md-default-fg-color--light);
}

.hero .github-link {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.45rem 1.4rem;
  border-radius: 2rem;
  background: var(--md-accent-fg-color);
  color: #fff !important;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none !important;
  transition: opacity 0.2s;
}
.hero .github-link:hover {
  opacity: 0.85;
}

/* ── Sidebar: make GitHub repo source widget visible ── */
.md-nav__source .md-source {
  background-color: rgba(0,0,0,.08);
  border: 1px solid rgba(0,0,0,.12);
  border-radius: 4px;
  color: var(--md-default-fg-color);
}
.md-nav__source .md-source:hover {
  background-color: rgba(0,0,0,.12);
}
.md-nav__source .md-source__repository,
.md-nav__source .md-source__fact {
  color: var(--md-default-fg-color--light);
}
.md-nav__source .md-source__icon svg {
  fill: var(--md-default-fg-color--light);
}
[data-md-color-scheme="slate"] .md-nav__source .md-source {
  background-color: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.12);
}
[data-md-color-scheme="slate"] .md-nav__source .md-source:hover {
  background-color: rgba(255,255,255,.14);
}
[data-md-color-scheme="slate"] .md-nav__source .md-source__repository,
[data-md-color-scheme="slate"] .md-nav__source .md-source__fact {
  color: rgba(255,255,255,.7);
}
[data-md-color-scheme="slate"] .md-nav__source .md-source__icon svg {
  fill: rgba(255,255,255,.7);
}

/* ── Paper metadata: make arXiv/code links stand out ── */
.md-content a[href*="arxiv.org"],
.md-content a[href*="github.com"],
.md-content a[href*="github.io"] {
  color: var(--md-accent-fg-color) !important;
  text-decoration: underline;
  text-decoration-style: solid;
  text-underline-offset: 2px;
}

.md-content a[href*="arxiv.org"]::after {
  content: " ↗";
  font-size: 0.8em;
  text-decoration: none;
}